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Hellwig, Olav; Kirk, Taryl L.; Kortright, Jeffrey B.; Berger, Andreas; Fullerton, Eric E.. (2003). A new phase diagram for layered antiferromagnetic films. , 2(2), 112–116. doi:10.1038/nmat806 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research